any substance or mammal smelling of a distinct combination of B.O., coffee, cigarettes, puke, and mold. Molvis is very recognizable in any 15 foot radius. it's very gross, and you might pass out if you come too close to it.

example #2
guy: so i was doin this chick last night, it was pretty sloppy but considering i was gettin some it was still pretty good. then out of nowhere there was this nasty overwhelming molvis smell comin from her downstairs situation, so i was like mayyyneee fuck dis shiiiit i gotsta get outta hurrrrrrr nigga! so then i dipped out and left dat bitch.

other guys: nigaaa you was right to dip outta dat. you mighta got da HERP or somethin nastyy if you overstayed yo welcome tooo long in dat vag!